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[Datsun 1200 encyclopedia]

Head Bolts

(Difference between revisions)

Datsun 1200 encyclopedia | Recent changes | Edit this page | Page history | Switch to MediaWiki mode

Printable version | Disclaimers | Privacy policy | Current revision
Categories: Cylinder Heads | Engine Mechanical
Revision as of 22:57, 2 August 2012
ddgonzal (Talk | contribs)
(->Overview)
<- Previous diff		 Current revision
ddgonzal (Talk | contribs)

Line 4: Line 4:
Retighten cylinder head bolts every 24 months or 24000 miles whichever comes first. Retighten cylinder head bolts every 24 months or 24000 miles whichever comes first.
-[http://ddgonzal.members.winisp.net/wiki/om1972/32.jpg http://ddgonzal.members.winisp.net/wiki/om1972/thumbs/32.jpg]+{{OwnersManual|32|32|24 months/24000 miles}}
600 mile service 600 mile service
Line 12: Line 12:
= Overview = = Overview =
- BOLT-FIXING CYLINDER HEAD SHORT+ BOLT-FIXING CYLINDER HEAD SHORT [9 needed, 97 mm length]
- 11056-18001 36 lb ft+ 11056-18001 36 lb ft [Original use: A10 & A12]
- 11056-H1000 43 lb ft+ 11056-H1000 43 lb ft [original use: A12]
- 11056-H2301 58 lb ft+ 11056-H2301 58 lb ft [original use: A12GX]
-Bolts are the same for A12/A14/A15, but require the stronger bolts.+{{Album|22286}}
-[http://datsun1200.com/modules/myalbum/photo.php?lid=24733 http://datsun1200.com/uploads/photos/24733.jpg]+ BOLT-CYLINDER HEAD, TO OIL GALLERY [1 needed]
 + 11057-18000 '
 + 11057-H1000 'T'
 + 11057-H2300 '13' for 1967-1973 engines [97 mm length]
 + 11057-H5700 '13' for 1974-up engines [111 mm length]
-[http://datsun1200.com/modules/myalbum/photo.php?lid=22286 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/22286.jpg]+{{Album|23623}}
-[http://datsun1200.com/modules/myalbum/photo.php?lid=23623 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/23623.jpg]+Bolts are the same for A12/A14/A15, but:
 +* A14/A15 require the stronger bolts (marked '13')
 +* A14/A15 has one longer bolt<br>{{UploadPostH|174_61f9b21aa96ea.jpg|496525}}
-= Part Numbers =+= Strengthened Cylinder Head Bolts =
 +stronger bolts (marked '13')
 +<br>{{Album|24733}}
-Original Lo-torque bolts (B10 & early B110 -1172) - 36 ft-lb+ 1973 A12 (early engine, upgraded H1000 bolts)
-* 11056-18001 BOLT-FIXING CYLINDER HEAD SHORT+ Torque: 40-43 ft-lb
-* 11057-18000 BOLT-FIXING CYLINDER HEAD LONG + CENTER BOLT: 8 mm central portion (head marked 'T')
-* 11058-18000WASHER-LOCK FIXING CYLINDER HEAD + OTHER BOLTS: 9 mm
 + {{UploadPost|174_61f9b20aab940.jpg|496525}}
 + {{UploadPost|174_61f9b226472ee.jpg|496525|was=Photo\1973_head_bolt.jpg}}
-[http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=56794 http://datsun1200.com/uploads/newbb/174_50033e73ecea0.jpg] [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=56794 http://ddgonzal.members.winisp.net/getThumb.aspx?width=140&uri=http://datsun1200.com/uploads/newbb/174_50033e859f7a8.jpg] [http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=56794 http://ddgonzal.members.winisp.net/getThumb.aspx?width=140&uri=http://datsun1200.com/uploads/newbb/174_50033e8cbbcd9.jpg] +Note 'T' bolt for center of early A12 engine. This is a low-torque bolt. The center bolt is thinner to allow [[Cylinder_Head_Identification#Cylinder_head_oil_passage|oil to flow around]] it up to the rocker shaft.
 +<br>{{Album|24528}}
-Newer medium torque bolts (1272-) - 43 ft-lb+'12' bolts
-* 11056-H1000 BOLT-FIXING CYLINDER HEAD SHORT (9 needed) $2.90+<br>{{UploadPost|174_50033e73ecea0.jpg|413008}} {{UploadPost|174_50033e859f7a8.jpg|413008}} {{UploadPost|174_50033e8cbbcd9.jpg|413008}}
-* 11057-H1000 BOLT-FIXING CYLINDER HEAD LONG [Center bolt] $2.51 +
-* 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD $2.28 +
 +Better to use the GX '13' center bolt, which is high-tensile chromoly V steel
 +<br>{{Album|4775}} {{UploadPost|7952_4cf7626132cc9.jpg|348263}} {{UploadPost|7952_4cf7639da9b87.jpg|348263}}
 +<br>"13" bolts were first used on the twin-carb [[A12GX Engine]], as opposed to single-carb engine bolts. "13" bolts can be used with any early engine (they are simply stronger than the earliest bolts).
-A12GX, A12T, A12S, A13, A14, A15, A12A - 58 ft-lbs+Note that A12/A12A/A13/A14/A15 all may use the '13' bolts, but the center bolt differs between early engines and late engines.
-* 11056-H2301 HEAD BOLT SHORT (9 needed) $3.96+
-** NOTE Some newer lo-power (round port) A12S are spec'd for 11056-H1000+
-* 11057-H2301 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (TO 6/73) $3.88+
-** one needed+
-* 11057-H5000 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (FROM 7/73) $4.03+
-** one needed+
-** Also used by Z24 and KA24E+
-* superceeded 11057-H5700?+
-[http://datsun1200.com/modules/myalbum/photo.php?lid=24528 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/24528.jpg]+Center bolt 11057-H5000 and 11057-H5700 are interchangeable
-<br>A12: Long middle bolt marked 'T'+<br>{{UploadPost|6595_4a2b961066620.jpg|257619}}
-<br>A14: Long middle bolt marked '13'+ 
 += Part Numbers =
 + Original Lo-torque bolts (B10 & early B110 -1172) - 36 ft-lb
 + * 11056-18001 BOLT-FIXING CYLINDER HEAD SHORT
 + * 11057-18000 BOLT-FIXING CYLINDER HEAD LONG
 + * 11058-18000WASHER-LOCK FIXING CYLINDER HEAD
 + 
 + Newer medium torque bolts (1272-) - 43 ft-lb
 + * 11056-H1000 BOLT-FIXING CYLINDER HEAD SHORT (9 needed) $2.90
 + * BOLT-FIXING CYLINDER HEAD LONG [Center bolt] $2.51
 + superceded by 11057-H5000/11057-H5010
 + * 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD $2.28
 + 
 + A12GX, A12T, A12S, A13, A14, A15, A12A - 58 ft-lbs
 + * 11056-H2301 HEAD BOLT SHORT (9 needed) $3.96
 + Also used by Z16/Z18/Z20/Z22 (10 per engine)
 + NOTE Some newer lo-power (round port) A12S are spec'd for 11056-H1000
 + * 11057-H2301 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (TO 6/73) $3.88
 + one needed
 + * 11057-H5700 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (FROM 7/73) $4.03
 + one needed
 + Also used by Z24, KA24E, NA20P (10 per engine)
 + replaced 11057-H5000 (lo-torque version)
 + * used by 1988- D21/WD21/C22 Z24 engine
 + 
 +A12: Long middle bolt marked 'T' (low-torque)
 +<br>A14: Long middle bolt marked '13' (hi-torque)
 +<br>{{Album|24528}}
Hi-torque bolts marked "13" on the head. Remove the valve cover to verify. Hi-torque bolts marked "13" on the head. Remove the valve cover to verify.
-<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=23377 http://datsun1200.com/uploads/photos/23377.jpg]+<br>{{Album|23377}}
head bolts head bolts
Line 61: Line 92:
13T 13T
-Lock Washer + Lock Washer
-* 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD -8504 $2.28 + * 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD -8504 $2.28
-* 11058-21002 Washer Cyl Head 8504- $2.57+ * 11058-21002 Washer Cyl Head 8504- $2.57
 + 
 +{{Album|22287}}
 + 
 + KA24E - 1989-1993 Nissan 240SX
 + 11057-H5010 10 needed
 + * Same as Datsun 1200 center bolt
 + 
 + KA24E - 1994-1998 Nissan 240SX
 + 11056-F3F01 10 needed. TTY bolts, do not reuse
 + * reportedly shorter than Datsun 1200/KA24E SOHC
 + 
 + Z20/Z22 Datsun 720
 + 11056-H2301 10 needed
 + * Same as Datsun 1200 (9 needed)
 + 
 + Z24 Datsun 720
 + 11057-H5000 10 needed
 + * Same as late Datsun 1200 (center bolt)
-[http://datsun1200.com/modules/myalbum/photo.php?lid=22287 http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/photos/22287.jpg]+= ARP Head Studs =
 +{{Main|ARP#Cylinder_Head_Studs}}
-[[Category:Engine Mechanical]]+[[Category:Cylinder Heads]][[Category:Engine Mechanical]]{{End}}

Current revision

A-series head bolts are designed to be reused; they are not Torque-To-Yield (TTY) bolts.

Contents

[edit]

Maintenance Schedule

Retighten cylinder head bolts every 24 months or 24000 miles whichever comes first.

1972 USA Owners manual (Page 32 ... 32):

29357.jpg   29362.jpg
24 months/24000 miles
600 mile service
24 months/24000 miles

See Changing Head Gasket for torque specifications and procedure.

[edit]

Overview 

BOLT-FIXING CYLINDER HEAD SHORT [9 needed, 97 mm length]
11056-18001 36 lb ft [Original use: A10 & A12]
11056-H1000 43 lb ft [original use: A12]
11056-H2301 58 lb ft [original use: A12GX]

22286.jpgAlbum 22286 

BOLT-CYLINDER HEAD, TO OIL GALLERY [1 needed]
11057-18000 '
11057-H1000 'T'
11057-H2300 '13' for 1967-1973 engines [97 mm length]
11057-H5700 '13' for 1974-up engines [111 mm length]

23623.jpgAlbum 23623

Bolts are the same for A12/A14/A15, but:

  • A14/A15 require the stronger bolts (marked '13')
  • A14/A15 has one longer bolt
    174_61f9b21aa96ea.jpgPost click for topic
[edit]

Strengthened Cylinder Head Bolts

stronger bolts (marked '13')
24733.jpgAlbum 24733 

1973 A12 (early engine, upgraded H1000 bolts)
Torque: 40-43 ft-lb
CENTER BOLT: 8 mm central portion (head marked 'T')
OTHER BOLTS: 9 mm
174_61f9b20aab940.jpgPost 496525
174_61f9b226472ee.jpgPost 496525

Note 'T' bolt for center of early A12 engine. This is a low-torque bolt. The center bolt is thinner to allow oil to flow around it up to the rocker shaft.
24528.jpgAlbum 24528

'12' bolts
174_50033e73ecea0.jpgPost 413008 174_50033e859f7a8.jpgPost 413008 174_50033e8cbbcd9.jpgPost 413008

Better to use the GX '13' center bolt, which is high-tensile chromoly V steel
4775.jpgAlbum 4775 7952_4cf7626132cc9.jpgPost 348263 7952_4cf7639da9b87.jpgPost 348263
"13" bolts were first used on the twin-carb A12GX Engine, as opposed to single-carb engine bolts. "13" bolts can be used with any early engine (they are simply stronger than the earliest bolts).

Note that A12/A12A/A13/A14/A15 all may use the '13' bolts, but the center bolt differs between early engines and late engines.

Center bolt 11057-H5000 and 11057-H5700 are interchangeable
6595_4a2b961066620.jpgPost 257619

[edit]

Part Numbers 

Original Lo-torque bolts (B10 & early B110 -1172) - 36 ft-lb
* 11056-18001 BOLT-FIXING CYLINDER HEAD SHORT
* 11057-18000 BOLT-FIXING CYLINDER HEAD LONG 
* 11058-18000WASHER-LOCK FIXING CYLINDER HEAD 

Newer medium torque bolts (1272-) - 43 ft-lb
* 11056-H1000 BOLT-FIXING CYLINDER HEAD SHORT (9 needed) $2.90
*  BOLT-FIXING CYLINDER HEAD LONG [Center bolt] $2.51
   superceded by 11057-H5000/11057-H5010
* 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD $2.28 

A12GX, A12T, A12S, A13, A14, A15, A12A - 58 ft-lbs
* 11056-H2301 HEAD BOLT SHORT (9 needed) $3.96
  Also used by Z16/Z18/Z20/Z22 (10 per engine)
  NOTE Some newer lo-power (round port) A12S are spec'd for 11056-H1000
* 11057-H2301 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (TO 6/73) $3.88
  one needed
* 11057-H5700 BOLT-CYLINDER HEAD LONG, TO OIL GALLERY (FROM 7/73) $4.03
  one needed
  Also used by Z24, KA24E, NA20P (10 per engine)
  replaced 11057-H5000 (lo-torque version)
  * used by 1988- D21/WD21/C22 Z24 engine

A12: Long middle bolt marked 'T' (low-torque)
A14: Long middle bolt marked '13' (hi-torque)
24528.jpgAlbum 24528

Hi-torque bolts marked "13" on the head. Remove the valve cover to verify.
23377.jpgAlbum 23377 

head bolts
Cro-Mo-V steel
13T

Lock Washer 
* 11058-H1000 WASHER-LOCK FIXING CYLINDER HEAD -8504 $2.28 
* 11058-21002 Washer Cyl Head 8504- $2.57

22287.jpgAlbum 22287 

KA24E - 1989-1993 Nissan 240SX
11057-H5010 10 needed
* Same as Datsun 1200 center bolt

KA24E - 1994-1998 Nissan 240SX
11056-F3F01 10 needed. TTY bolts, do not reuse
* reportedly shorter than Datsun 1200/KA24E SOHC

Z20/Z22 Datsun 720
11056-H2301 10 needed
* Same as Datsun 1200 (9 needed)

Z24 Datsun 720
11057-H5000 10 needed
* Same as late Datsun 1200 (center bolt)
[edit]

ARP Head Studs

Main: ARP#Cylinder_Head_Studs
 
¤

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